Remove unnecessary dictionary pack code

java/AndroidManifest.xml

...o/inputmethod/dictionarypack/DictionaryPackConstants.java

...rg/futo/inputmethod/latin/BinaryDictionaryFileDumper.java

...rc/org/futo/inputmethod/latin/BinaryDictionaryGetter.java

java/src/org/futo/inputmethod/latin/DictionaryFactory.java

...tmethod/latin/DictionaryPackInstallBroadcastReceiver.java

java/src/org/futo/inputmethod/latin/LatinIME.kt

java/src/org/futo/inputmethod/latin/LatinIMELegacy.java

...rg/futo/inputmethod/latin/xlm/LanguageModelFacilitator.kt